-40%
✅Serviced✅ SMC Pentax-M 50mm f1.7 Prime Lens 2954309
$ 39.59
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Description
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From a highly rated seller with 20+ years of presence on eBay
*** Just Serviced ***
SMC Pentax-M 50mm f1.7 Prime Lens, Manual Focus
Lens works 100%, excellent glass and mechanics, mintish appearance
SMC-M is the line of Pentax manual focus lenses with all metal construct in a compact size and were built as sturdy as the previous generation. Very easy to handle and a perfect match for the overall smallish Pentax camera bodies. The SMC-M 50/1.7 is very compact and is a very sharp lens.
Those lenses are nearly 40 years old and generally need service to restore its performance. The main culprit is the grease in the lens. After decades of use (or disuse) it usually has separated and the lighter oil part has evaporated and condensed onto the internal glass surfaces to form a film of numerous tiny oil droplets (oil haze) - very detrimental to image quality as it softens the image quite a lot. The oil haze is much worse than a little swirls of cleaning mark on the coating or a few sporadic dust particles inside the lens.
Some of the lenses, if they have experienced hot/cold conditions for example in a storage unit, the lighter oil may have got onto the blades to cause a sluggish or completely stuck aperture. Even if not yet on blades, often the oil has crept close to the aperture cartridge and before long it will get onto the blades. The grease on the focus helicoids may have deteriorated (separated, lighter oil is gone, heavier part has gummed up) to cause a stiff focus ring or very loose focus action with some play. If the lens has been on beach or in dusty environment, the focus action may be gritty.
The lens for sale here has just been completely serviced. We cleaned it inside out. Internal glass surfaces have been cleaned and oil in vicinity of the aperture cartridge as well as gummed up grease at various places has been cleaned off. New helicoid grease applied. The lens will serve you many more years without you worrying about those issues mentioned above.
The lens glass is clear and bright. Glass has no scratch, fungus or haze. The SMC coating is looks excellent and beautiful both front and rear. As usual, if you shine strong light through the lens, it is possible you see a couple of tiny dusts - this is normal and has no effects on lens performance. Aperture blades has no oil and are snappy. Aperture ring clicks to every stop positively. Focus action is creamy smooth with nice resistance. Filter threads are good - filter screws on/off w/o effort.
Lens barrel cosmetically in EX+ to mint minus condition. Not much noticeable finish wear - there may be hint of bright spots on some sharp edges if you look for them carefully. The lens looks very clean with all lettering is crisp and bright. See photos for cosmetics.
Includes a pair of generic caps as shown.
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